/******************************************************************************

    Copyright (C) 2006 Alessio Stalla (alessiostalla@gmail.com)

    This file is part of PrettyProlog.

    PrettyProlog is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    PrettyProlog is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with PrettyProlog; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    See the file COPYING for further details.

 *****************************************************************************/

package prettyprolog.gui;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.AbstractButton;
/**
 *
 * @author Alessio Stalla
 */
abstract class MultipleButtonToggler implements ActionListener {
    
    private java.util.List<AbstractButton> list = new ArrayList<AbstractButton>();
    private boolean state;
    
    public MultipleButtonToggler(boolean initial_state) {
        state = initial_state;
    }
    
    public void actionPerformed(ActionEvent e) {
        state = !state;
        for(AbstractButton btn : list)
            btn.setSelected(state);
        handleAction(e);
    }
    
    public void addButton(AbstractButton btn) {
        list.add(btn);
        btn.setSelected(state);
        btn.addActionListener(this);
    }
    
    public void removeButton(AbstractButton btn) {
        list.remove(btn);
        btn.removeActionListener(this);
    } 
    
    protected boolean getState() {
        return state;
    }
    
    protected abstract void handleAction(ActionEvent e);
    
}
